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Fast Zooming and Focusing Technique for Implementing a Real-time Surveillance Camera System  

한헌수 (숭실대학교 정보통신전자공학부)
최정렬 (숭실대학교 대학원 전자공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.3, 2004 , pp. 74-82 More about this Journal
Abstract
This paper proposes a fast zooming and focusing technique for implementing a real-time surveillance camera system which can capture a face image in less than 1 second. It determines the positions of zooming and focusing lenses using two-step algorithm. In the first step, it moves the zooming and focusing lenses simultaneously to the positions calculated using the lens equations for achieving the predetermined magnification. In the second step the focusing lens is adjusted so that it is positioned at the place where the focus measure is the maximum. The camera system implemented for the experiments has shown that the proposed algorithm spends about 0.56 second on average fur obtaining a focused image.
Keywords
Surveillance system; Zooming; Focusing; Focus value; Facial image;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Ko,Young-Ki, Lee, Jun-Sok, Jung, You-Young, Kim, B. and Ko, S., 'An advanced camera system having fast autofocus control', Consumer Electronics, ICCE International Conference, pp. 210-211, 2001   DOI
2 Willson, R. G., 'Modeling and Calibration of Automated Zoom Lenses', Ph.D thesis, Department of Electrical and Computer Engineering, Caneigee Mellon University, 1994
3 Helmli, F. S. and Scherer, S., 'Adaptive shape from focus with an error estimation in light microscopy', Image and Signal Procssing and Analysis, ISPA, Proc. of the 2nd Int. Symp., pp. 188-193, 2001   DOI
4 Park, H. and Hwang,Y., 'Shape Measurement Technique using Machine Vision', J. of KSPE, Vol. 18, No. 3, pp. 10-17, 2001
5 Choi, D., Song, P., Kim, H. and Hahn, H., 'Shape Adaptive Searching Technique for Finding Focused Pixels', J.of KSPE, Vol. 19, No. 2, pp. 151-159, 2002   과학기술학회마을
6 Zhao, H. and Hung, Y., 'Real-time Multiple-Person Tracking System', Int. Conf. on Pattern Recognition, Vol. 2, pp. 897-900, 2002   DOI
7 Hsu, M. A. and Jain, A. K., 'Face detection in color images', IEEE Trans.PAMI, Vol.24, No.5, pp. 696-706, 2002   DOI   ScienceOn
8 Ooi, K., Izumi, K., Nozaki, M. and Takeda, I., 'An Advanced Auto-Focus System for Video Carmera Using Quasi Condition Reasoning', Consumer Electronics, ICCE, IEEE International Conference, pp. 348-349, 1990
9 Chen, Y. S. and Shin, S. W., 'Camera Calibration with a Motorized Zoom Lens', Proc. of 15th Int. Conf. on Pattern Recognition, Vol. 4, pp. 495-498, 2000   DOI
10 Fayman, J. A., Sundarsky, O. and Rivlin, 'Zoom Tracking and its Applications', Machine Vision Applications, Vol. 13, No. 1, pp. 25-37, 2001   DOI
11 Zhang, X., Fukuda, N., Obuchi, Y., Kambe, T., Kubo, N., Kawamura, H. and Suzuki, I., 'A signal Processing System on Chip for Digital Cameras', Industrial Electronics Society, IECON, 26th Annual Conf. of the IEEE, Vol.2, pp.1243-1248, 2000